"The high quality SHM-CD (Super High Material CD) format features enhanced audio quality through the use of a special polycarbonate plastic. SHM-CDs feature improved transparency on the data side of the disc, allowing for more accurate reading of CD data by the CD player laser head. SHM-CD format CDs are fully compatible with standard CD players"

It ain't about how hard you can hit, it's about how hard you can get hit: how much you can take and keep moving forward. That's how winning is done!